Alright, let's work through 8413 times 5385 step by step
8413 × 5385 = 5385 × (8413)
+ 5385 × 3 what gives us 16155
+ 5385 × 10 what gives us 53850
+ 5385 × 400 giving us 2154000
+ 5385 × 8000 giving us 43080000

= 45304005
